RemGrit, 3" Coarse Jig Saw Blade, Designed To Cut Fiberglass, Ceramic Tile, Laminates & Composites, Tungsten Carbide Grit Cutting Edge, Resistant To Heat & Abrasion, Cuts On Both Strokes, Alloy Steel Backing, Grit Hardness RC 70, Produces Exceptionally Smooth Cuts, Bosch Shank, Made In USA.